How do you evaluate #15-13+2#?

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Answer 1 · 2018-03-15T00:13:06

See below.

P.E.M.D.A.S.

Parentheses
Exponents
Multiplication
Division
Addition
Subtraction

Addition comes before subtraction so we need to add #13# and #2#

#13# #+# #2# #=# #15#

The new equation is:

#15# #-# #15#

All we have left to do is to subtract, so:

#15# #-# #15# #=# #0#

Our final answer is #0#

Hope I helped (:

Answer 2 · 2018-03-15T00:45:07

4

We use PEMDAS:

#color(red)(P)# - Parentheses (also known as Brackets)
#color(blue)(E)# - Exponents
#color(green)(M)# - Multiplication
#color(green)(D)# - Division (this has the same weight as M and so I gave it the same colour)
#color(brown)(A)# - Addition
#color(brown)(S)# - Subtraction - (again, same weight as A and so the same colour)

#color(brown)(A)# and #color(brown)(S)# have the same weight and so we work from left to right:

#15-13+2#

#=2+2#

#=4#